Discussion @ 1007. Code Words @ Timus Online Judge

how to determine the end of the console's input with Java

Posted by robinpjl 15 Sep 2009 23:41

THX

Re: how to determine the end of the console's input with Java

Posted by Sergey Lazarev (MSU Tashkent) 16 Sep 2009 00:15

Scanner in;
while (in.hasNext()){...} (for String)
or
while (in.hasNextType()){...} (for Type = Int, Double, Byte, ...)

BufferedReader in;
int c;
while ((c=in.read()) != -1) {...}

StreamTokenizer in;
in.nextToken();
while (in.ttype != StreamTokenizer.TT_EOF){
...
in.nextToken();
}

Edited by author 16.09.2009 00:17

Re: how to determine the end of the console's input with Java

Posted by robinpjl 16 Sep 2009 15:18

i think ,second method(use -1 to end input) can't ac this problem with JAVA,
and i try to use first Scanner method to solve it,failed
,and TT_EOF is -1 in nature.

Re: how to determine the end of the console's input with Java

Posted by Alex Tolstov (Vologda STU) 16 Sep 2009 15:45

the second method is correct.

Quote from java.sun.com:
>>
read

public int read()
         throws IOException

    Read a single character.

    Returns:
        The character read, as an integer in the range 0 to 65535 (0x00-0xffff), or -1 if the end of the stream has been reached
    Throws:
        IOException - If an I/O error occurs

<<
http://java.sun.com/j2se/1.5.0/docs/api/java/io/BufferedReader.html#read%28%29

Discussion of Problem 1007. Code Words